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High-order adiabatic approximations related to non-Abelian Berry's phase factors and nuclear quadrupole resonance
Phys. Rev. D 41, 1318 – Published 15 February, 1990
DOI: https://doi.org/10.1103/PhysRevD.41.1318
Abstract
A high-order adiabatic-approximation method is proposed to study the time evolution of degenerate quantum-mechanical systems with slowly changing Hamiltonians. We not only discuss the quantum adiabatic theorem, induced gauge structure, and non-Abelian Berry's phase factors in the first-order approximation, but we also give nonadiabatic corrections for problems in the second-order approximation. With the nuclear quadrupole resonance as an explicit example, we analyze the above-mentioned questions in detail and point out the observable effects of non-Abelian Berry's phase factors for nonadiabatic transitions between two instantaneous states in an improvement of Tycko's experiment.
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